HUAWEI MU709 Series HSPA+ LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 09 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
37
Figure 3-15
Pin definition of USIM Socket
Pin 1:
USIM_VCC
Pin 2:
USIM_RESET
Pin 3:
USIM_CLK
Pin 5:
GND
Pin 6:
VPP(Programming Voltage)
Pin 7:
USIM_DATA
Pin 9:
USIM_DET
Figure 3-16
Connections of the USIM_DET pin
Module
(DCE)
1.8 V
USIM_DET
USIM Socket
470 pF
CD
1 kΩ
CD is a pin detecting USIM card in the USIM socket.
If the USIM card is present, USIM_DET pin should be high, and the CD is open.